openjdk: remove need for fdescfs(5) and probably procfs(5)

Implement getCommittedVirtualMemorySize() directly using sysctl
kern.proc.vmmap
Implement getOpenFileDescriptorCount() directly using sysctl
kern.proc.nfds

Note on openjdk17 use closefrom where possible (note this use case is
only in openjdk 17, 21, 23 and 24)

Remove the message about the use of fdescfs(5) as this is not needed
for sure, keep the information about procfs(5) as I have not analysed
enough the source code to make sure it is not used anywhere else, but
I don't think it is.

1 files changed, 1 insertions, 4 deletions

diff --git a/java/openjdk24/pkg-message b/java/openjdk24/pkg-message
index 2ea3d87d89c8..a266eda414d0 100644
--- a/java/openjdk24/pkg-message
+++ b/java/openjdk24/pkg-message
@@ -1,17 +1,14 @@
 [
 { type: install
   message: <<EOM
-This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd and
-procfs(5) mounted on /proc.
+This OpenJDK implementation may requires procfs(5) mounted on /proc.
 
 If you have not done it yet, please do the following:
 
-	mount -t fdescfs fdesc /dev/fd
 	mount -t procfs proc /proc
 
 To make it permanent, you need the following lines in /etc/fstab:
 
-	fdesc	/dev/fd		fdescfs		rw	0	0
 	proc	/proc		procfs		rw	0	0
 EOM
 }